Cast refractory block



June 2,1942. G. s. 'FULCHER 2 ,0

CAS T REFRACTORY BLOCK Filed Sept 23, 1939 Patented June 2, 1942 UNITED STATES PATENT OFFICE CAST REFRACTORY BLOCK Gordon S. Fulcher, Chevy Chase, Md., assignor to Corhart Refractories Company, Louisville, Ky., a corporation of Delaware Application September 23, 1939, Serial No. 296,311

(CINE-39) 3 Claims.

In my prior application Serial No. 166,15 filed September 28, 1937, Patent No. 2,201,723, I disclosed a method of producing a cast refractory block from molten material in which the cavities resulting from the contraction of such material during solidification are substantially symmetrical in respect to an axis of the block which sought to be protected and in this drawing the block is shown as being substantially L-shaped, consisting of the two limbs a and b and in which the cavities resulting from contraction are concentrated as at c at the free end of the limb a.

By casting this block with one of the limbs substantially horizontal a very dense structure is produced in the other limb and by tilting the block around the axis d-d at right angles to the plane of the limbs of the block, (as shown, by either-of the arrows) before the block has solidified the cavities will be concentrated and segregated in the resultant upper end of the previously horizontal limb, thus producing a solid and dense structure of the block at the junction of the two limbs.

Having thus described my invention what I claim and desire to procure" by Letters Patent is:

l. A cast block of refractory material, the cavities resulting from the contraction of such material during solidification being substantially symmetrical in respect to an axis of the block which was horizontal during the casting and substantially unsymmetrical with an axis which was vertical during the casting.

2. A two-limbed cast block of refractory material, the cavities resulting from the contraction of such material during solidification being segregated at the free end of that limb of the block which was substantially horizontal during the casting.

3. The hereinbefore described method of casting and solidifying an L-shape refractory block from molten material which comprises positioning a proper mold with one limb vertical and the other horizontal, pouring the molten material into the mold and thereafter during solidification turning the mold around a horizontal axis located near the junction of the two limbs.

GORDON S. FULCHER. 

